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Rana sylvatica artificial breeding
Rana sylvatica, also known as Hashi's, is a relatively high value economic animal in China's frog species. The dried tuber of the female Rana sylvatica is called "Oyster Sauce" and it is a nourishing and strong product. Fresh live Rana's meat is delicate and delicious, and it is a rare meat food favored by people. 1. Biological characteristics of Rana sylvatica Rana's one-year life cycle can be divided into two stages: water life and land life. The period of life in the water generally begins in late September and ends in early April in the following year. Rana sylvatica prey on live food, mainly arthropods, followed by Arachnidae and Polypodidae. 2. The current construction of the Sanchi Lake Breeding Rana is mainly the breeding and cultivating of Rana temporaria, which will be dispersed into the mountain forest after being metamorphosed into larvae for any free activity. After mature and mature (more than 2 years old) Capture processed products in autumn and winter. (1) Site Selection According to the living habits of Rana sylvatica, the site must be built in a place surrounded by large-area broad-leaved forests or coniferous and broad-leaved mixed forests. It cannot be built in pure coniferous forests, especially near large areas of larch. . Field should be 1-3 meters wide, 30-50 cm depth streams, adequate water throughout the year, and there are several deep water to meet the needs of Rana winter. (2) breeding grounds by a number of different specifications and use of the pool composition, including spawning pond, hatchery, rearing ponds and pools metamorphosis, metamorphosis pool to be built near the stocking field, in order to complete the metamorphosis of tadpoles can be immediately transferred to the forest . The spawning pond area is suitable for each 20-30 cm2, rectangular. It is generally located near the upstream canal. The hatchery is preferably 64 meters long. The rearing pond is the largest number of ponds. The pool type is suitable for a 104-meter rectangle pool. The depth of the pool is 30-50 cm. There are 3-5 "safe pits" in the pool. When the water is cut off, the bowl is dead due to dryness. The pit is lined with plastic film and pressed with a layer of soil to prevent the film from being washed away. Generally, it is appropriate to breed about 10 million cubs per breeding ground. 3. Breeding Techniques (1) Breeding characteristics of Rana sylvatica Rana are only bred once a year. Sexual maturity can be reached 24 months after birth and the average number of eggs is 1000-2000 capsules per animal. After reaching sexual maturity, the Rana sylvatica releases hibernation around mid-April and then goes downstream to ashore during the night and enters the spawning ground after landing to begin mating. The female Rana communis does not eat or drink after spawning, lurking in soft soil, litter, and after about half a month of reproductive dormancy, it enters the forest to make a living. (2) Artificial propagation method The frogs can accurately grasp the time during the spring and fall harvest. The best fishing period is from early to mid-April. Autumn fishing is the most convenient, and the number of autumn forest frogs is greater. From late September to mid-October, Rana sylvatica is most suitable for hibernation, and frogs can be slaughtered with sacks or baskets. The frogs caught in the fall after the selection of the species will be stored in winter for winter and can be stored in the reservoir or in the cellar method. After wintering, the frogs should be placed in a spawning cage at a 1:1 male-female ratio when the water temperature rises above 5°C, and the density is 200-300 pairs per square meter. Install the spawning cage immediately into the hatchery, with a depth of 40-50 cm. The cage should be lifted and the water depth in the cage should be about 10 cm. After being spawned, the best water temperature for the spawning period is 10°C. The eggs in the same period should be picked up in the same hatchery in time to avoid the phenomenon of eating too much at the time of spawning. The density in the hatchery pool should be 10-15 groups/m2, and the water temperature should be kept above 6°C in the initial stage of incubation. The maximum of 15-20°C in the later period cannot be higher than 25°C. After 15-20 days, hatches can be hatched. When hatched, high-density stocking can be used. Several evacuations are carried out on the 10th, 20th, and 30th days after birth to make the final density 500-1000/m3. . After 5-7 days of birth, the cockroach can be fed. The feed consists of bean cake, cornmeal, green vegetables, slag, etc. The feed must be crushed and heated and cooked. Early (7-15 days) can be fed once a day. During the peak stage of growth (25-30 days), feeding should be done on a daily basis, feeding 3-5 times a day to a later period (30-40 days). The digestive organs should be well developed, and the proportion of green feed can be appropriately increased. 3-5% is appropriate. (3) The management of the flood season is mainly to put the bait on the feed board when feeding, and put the water board on the feed board to prevent the material from being directly put into the water to pollute the water source and keep the water source clean. When water is poured, the flow of water must be slowed to adapt to the requirements of the water. Also adjust the water temperature by adjusting the amount of water. When the age reaches 20-35 days, the metabolism is strong and the oxygen consumption is high. It is better to refresh the pool water every 2-4 hours to maintain more dissolved oxygen in the water. In this period, we must also do a good job of natural enemies to prevent damage (Rana's natural enemies are rats and snakes). (4) Management of metamorphosis This period of stocking density can be 5000/m2. The metamorphosis period is the last part of the breeding work and it is necessary to strengthen the feeding and management. First of all, we must ensure the supply of metamorphic water, never water. Secondly, to feed enough to ensure the supply of insects, it is possible to lure more insects by stacking grass, manure, or light traps in the pool, and to do a good job of natural enemies in the same period as the flood season. After about 10 days of metamorphosis, the young frog leaves the pond and walks along the path the parents walked into the forest. 4. Rana sylvatica's processing The diaspora after entering the water, that is, in late September, is the best time for fishing. In the middle of September, Rana can also be used to dig trenches to intercept Rana. The captured female wood frog must be dried before taking the oil. Generally kill the frog with hot water at 60°C--70°C, then use a rope to penetrate the string and hang it in a well-ventilated place. After 7-10 days, dry Rana sylvatica can be stripped after being softened. The method is to put dry Rana storks in water of 60°C--70°C for 5-10 minutes, take them out into pots or other containers, cover them with wet sacks, and put them in a warm room to soften the skin and bones. Pay special attention to prevent freezing during the drying process. When peeling off the oil, break the head of the frog from the neck to the back and tear it off together with the spine to peel off the back of the frog body and remove the oil. Remove the skin membrane, remove impurities such as black beans, put it in the plate, place in a cool and ventilated place to dry, strictly forbid sunlight, fire, bake and high temperature treatment to prevent oil from affecting the color and quality, dry to 90% dry Can be stored or sold, over dry gray and fragile, can not sell genuine price. With regard to the packaging of Rana oil, the packaging must be sealed, and the insects must be sealed. They must be packed in glass bottles and iron cans. They must not be packed in plastic bags, paper and wooden boxes, and they can be filled into cylinders and cans. An environment in which mold pests cannot survive. Then put it in a cool dry place. Put the oiled paper on the bottom of the container and do not forget to spray it.
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